Set a rev B MBA next to a unibody MB and look at the difference in display quality. It will be obvious within SECONDS. However, to make yourself really understand, play ANY video on both at the same time, it doesn't even have to be HD.
I own both and I cannot believe how inferior the unibody MB display is. It is very washed out and is a dark grayish/purple instead of black where should be black. When I first bought the unibody MB, I thought it had a nice display, except the viewing angles were bad. It was only after truly comparing that I realized it wasn't just the viewing angles, the MB has a truly inferior display.
BUT, you get what you pay for. The MB is a consumer product. The MBA is a professional/executive type product.
In addition, someone else made comments that this user had SSD, but that doesn't even matter if it is a PATA controller as on the original MBA. The PATA controller is the constraint. This is why the rev B SSD is literally a game changer for the MBA. AND, the rev A MBA with SSD and 1.8 GHz, is easily outperformed at every level by the rev B MBA with 1.6 GHz and HDD. It's all in the controller...
Most people don't fully understand the differences between the two MBAs... and if only using the rev B MBA for a few minutes, and not truly comparing, I can understand how think it's probably same.
My rev B MBA is far SUPERIOR in every way to my unibody MB. In fact, I will give up the 2.4 GHz for my 1.86 GHz CPU any day of the week considering my rev B MBA has DOUBLE the L2 cache of the unibody MB. It makes a big difference if you research L2 cache you can understand how well it is respected to use MORE L2 cache for better CPU performance in accessing anything in cache. Whole system is complex but it is noted that even minor amounts of L2 cache help CPUs greatly, a double cache size is NOT double power or processing power NO, that is not what I am saying.
What I am saying is my 1.86 GHz MBA with 2 GB RAM and SSD outperforms BOTH a unibody MB with 2.4 GHz, 4 GB 1066 MHz RAM, and 7200 RPM 320 GB HDD AND a MacBook Pro v2,2 with 2.33 GHz CPU, 4 GB 667 MHz RAM, and 7200 RPM 320 GB HDD.
The rev B MBA seems faster for ALL NORMAL TASKS I use my Mac for. Boot ups happen in less than half the time. Apps open absolutely INSTANTLY in my MBA, and large files open effortlessly every time. I notice not little differences but BIG differences. The rev B is a completely different computer than the rev A, but I can see how a rev A MBA owner would LEAVE the MBA for a better unibody MB. The unibody MB will BLOW PAST the rev A MBA. It doesn't matter if the rev A MBA has SSD and 1.8 GHz CPU, the unibody MB will absolutely destroy it when it comes to performance. The same does NOT hold true with the new rev B MBA. It can hold its own against the MB and even MBP... the SSD is a game changer for the rev B MBA. It makes a bigger difference in speed than the CPU and etc.
But from someone that experienced the true nature of the original MBA, I can understand how hard it would be for a rev A MBA owner to understand just how different the rev B MBA is with SSD. I can understand that they may have SSD in a rev A and not understand that SSD is NOT THE SAME in both versions. PATA vs SATA-II controller.
I was very frustrated with my rev A MBA, and it took a lot of research, reading, and using several rev B MBAs for ample time to realize just how big the changes were - across the board!
To those who have experienced the original MBA and refuse to give the rev B a try, I completely understand. But in the end, the rev B MBA is a superior Mac and only the switchers from rev A MBAs to Unibody MBs are missing out. The ones that switch from a rev A MBA to a rev B MBA NEVER knew what they were missing, and are absolutely amazed by the differences.
This all is advice and logic for most people. There are stragglers and outliers who the "norm" does not apply to. I understand that not everyone is meant to be a rev B MBA buyer/owner, but for those who do, the reward is grand.
Go Apple Mac... whether it be a MB, MBP, MBA, MP, Mm, or iMac!